Android Learning Note (17) Broadcastreceiver

1. Receiving broadcasts

1. Create a class that inherits Broadcastreceiver, and the OnReceive () method in which it is replicated
2. Register the Broadcastreceiver in the Androidmanifest.xml file

After the setting is complete, if there is a broadcast that meets the criteria, the system automatically generates a corresponding Broadcastreceiver object, and then calls the OnReceive () method inside. When the method is executed, the Boadcastreceiver object is destroyed. The next time the trigger is generated is a new Broadcastreceiver object.

 public  class  myreceiver extends   broadcastreceiver{@Override  public  void   OnReceive (Context Context, Intent Intent) { // dosomething
    }}  

<android:name= ". Myreceiver ">    <intent-filter>         <   android:name= "Android.provider.Telephony.SMS_RECEIVED"/>     </intent-filter></Receiver>

2. Send Broadcast

1. Create a intent to send
2. Send broadcast via Sendbroadcast () or Sendorderedbroadcast ()

 Public void OnClick (View v) {    // Create Intent object    new  Intent ();    Intent.setaction ("Android.provider.Telephony.SMS_RECEIVED");    Intent.putextra ("msg", "message");     // Send broadcast     Sendbroadcast (intent);}

Android Learning Note (17) Broadcastreceiver